1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "case_closed_debug.h"
#include "console.h"
#include "device_state.h"
#include "gpio.h"
#include "rdd.h"
#include "registers.h"
#include "uartn.h"
#include "usb_api.h"
#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
static int uart_enabled, enable_usb_wakeup;
struct uart_config {
const char *name;
enum device_type device;
int tx_signal;
};
static struct uart_config uarts[] = {
[UART_AP] = {"AP", DEVICE_AP, GC_PINMUX_UART1_TX_SEL},
[UART_EC] = {"EC", DEVICE_EC, GC_PINMUX_UART2_TX_SEL},
};
static int ccd_is_enabled(void)
{
return !gpio_get_level(GPIO_CCD_MODE_L);
}
int is_utmi_wakeup_allowed(void)
{
return enable_usb_wakeup;
}
/* If the UART TX is enabled the pinmux select will have a non-zero value */
int uartn_enabled(int uart)
{
if (uart == UART_AP)
return GREAD(PINMUX, DIOA7_SEL);
return GREAD(PINMUX, DIOB5_SEL);
}
/* Connect the UART pin to the given signal */
static void uart_select_tx(int uart, int signal)
{
if (uart == UART_AP)
GWRITE(PINMUX, DIOA7_SEL, signal);
else
GWRITE(PINMUX, DIOB5_SEL, signal);
}
static int servo_is_connected(void)
{
return device_get_state(DEVICE_SERVO) == DEVICE_STATE_ON;
}
void uartn_tx_connect(int uart)
{
if (!uart_enabled || !ccd_is_enabled())
return;
if (servo_is_connected()) {
CPRINTS("Servo is attached cannot enable %s UART",
uarts[uart].name);
return;
}
if (device_get_state(uarts[uart].device) == DEVICE_STATE_ON)
uart_select_tx(uart, uarts[uart].tx_signal);
else if (!uartn_enabled(uart))
CPRINTS("%s is powered off", uarts[uart].name);
}
void uartn_tx_disconnect(int uart)
{
/* If servo is connected disable UART */
if (servo_is_connected())
uart_enabled = 0;
/* Disconnect the TX pin from UART peripheral */
uart_select_tx(uart, 0);
}
void rdd_attached(void)
{
/* Indicate case-closed debug mode (active low) */
gpio_set_level(GPIO_CCD_MODE_L, 0);
/* Enable CCD */
ccd_set_mode(CCD_MODE_ENABLED);
enable_usb_wakeup = 1;
/* Enable device state monitoring */
device_detect_state_enable(1);
}
void rdd_detached(void)
{
/* Disable device state monitoring */
device_detect_state_enable(0);
/* Disconnect from AP and EC UART TX peripheral from gpios */
uartn_tx_disconnect(UART_EC);
uartn_tx_disconnect(UART_AP);
/* Disable the AP and EC UART peripheral */
uartn_disable(UART_AP);
uartn_disable(UART_EC);
/* Done with case-closed debug mode */
gpio_set_level(GPIO_CCD_MODE_L, 1);
enable_usb_wakeup = 0;
/* Disable CCD */
ccd_set_mode(CCD_MODE_DISABLED);
}
static int command_ccd(int argc, char **argv)
{
if (argc > 1) {
if (!strcasecmp("uart", argv[1]) && argc > 2) {
if (!strcasecmp("enable", argv[2])) {
uart_enabled = 1;
uartn_tx_connect(UART_EC);
uartn_tx_connect(UART_AP);
} else if (!strcasecmp("disable", argv[2])) {
uart_enabled = 0;
uartn_tx_disconnect(UART_EC);
uartn_tx_disconnect(UART_AP);
}
} else if (argc == 2) {
if (!strcasecmp("enable", argv[1]))
rdd_attached();
else if (!strcasecmp("disable", argv[1]))
rdd_detached();
} else
return EC_ERROR_PARAM1;
}
ccprintf("CCD: %s\nAP UART: %s\nEC UART: %s\n",
ccd_is_enabled() ? " enabled" : "disabled",
uartn_enabled(UART_AP) ? " enabled" : "disabled",
uartn_enabled(UART_EC) ? " enabled" : "disabled");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(ccd, command_ccd,
"[uart] [enable|disable]",
"Get/set the case closed debug state",
NULL);
|
